メタデータ
| 項目 |
値 |
| Designation |
P/2008 O3 (Boattini) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-06-03T01:59:52.333440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:21Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
28.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-08-28.0000000 |
| e |
0.69495599 |
| q (au) |
2.497269 |
| a (au) |
8.186587 |
| i (deg) |
32.269872 |
| Ω (om, deg) |
47.572666 |
| ω (w, deg) |
340.983593 |
| M (ma, deg) |
3.615161 |
等級
散乱 + 全体線形
$$
M_a = (12.607 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.607 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.664 |
| k |
0.800 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
15:26:28.34 |
-24:00:56.4 |
HIP 75478 |
27.70 |
| 2026-05-12 12:00 |
15:26:17.68 |
-24:00:38.5 |
HIP 75478 |
25.91 |
| 2026-05-13 00:00 |
15:26:07.01 |
-24:00:20.4 |
HIP 75478 |
24.23 |
| 2026-05-13 12:00 |
15:25:56.33 |
-24:00:02.1 |
HIP 75478 |
22.68 |
| 2026-05-14 00:00 |
15:25:45.64 |
-23:59:43.6 |
HIP 75478 |
21.31 |
| 2026-05-14 12:00 |
15:25:34.95 |
-23:59:24.9 |
HIP 75478 |
20.14 |
| 2026-05-15 00:00 |
15:25:24.26 |
-23:59:06.0 |
HIP 75478 |
19.21 |
| 2026-05-15 12:00 |
15:25:13.56 |
-23:58:46.9 |
HIP 75478 |
18.56 |
| 2026-05-16 00:00 |
15:25:02.86 |
-23:58:27.6 |
HIP 75478 |
18.22 |
| 2026-05-16 12:00 |
15:24:52.16 |
-23:58:08.2 |
HIP 75478 |
18.22 |
| 2026-05-17 00:00 |
15:24:41.47 |
-23:57:48.5 |
HIP 75329 |
18.17 |
| 2026-05-17 12:00 |
15:24:30.77 |
-23:57:28.7 |
HIP 75329 |
16.15 |
| 2026-05-18 00:00 |
15:24:20.08 |
-23:57:08.8 |
HIP 75329 |
14.28 |
| 2026-05-18 12:00 |
15:24:09.39 |
-23:56:48.6 |
HIP 75329 |
12.61 |
| 2026-05-19 00:00 |
15:23:58.71 |
-23:56:28.3 |
HIP 75329 |
11.24 |
| 2026-05-19 12:00 |
15:23:48.04 |
-23:56:07.8 |
HIP 75329 |
10.29 |
| 2026-05-20 00:00 |
15:23:37.37 |
-23:55:47.2 |
HIP 75329 |
9.87 |
| 2026-05-20 12:00 |
15:23:26.71 |
-23:55:26.4 |
HIP 75329 |
10.06 |
| 2026-05-21 00:00 |
15:23:16.07 |
-23:55:05.5 |
HIP 75329 |
10.83 |
| 2026-05-21 12:00 |
15:23:05.43 |
-23:54:44.5 |
HIP 75329 |
12.05 |
| 2026-05-22 00:00 |
15:22:54.81 |
-23:54:23.3 |
HIP 75329 |
13.62 |
| 2026-05-22 12:00 |
15:22:44.20 |
-23:54:01.9 |
HIP 75329 |
15.41 |
| 2026-05-23 00:00 |
15:22:33.61 |
-23:53:40.5 |
HIP 75329 |
17.36 |
| 2026-05-23 12:00 |
15:22:23.03 |
-23:53:18.9 |
HIP 75329 |
19.43 |
| 2026-05-24 00:00 |
15:22:12.47 |
-23:52:57.2 |
HIP 75329 |
21.57 |
| 2026-05-24 12:00 |
15:22:01.93 |
-23:52:35.3 |
HIP 75329 |
23.77 |
| 2026-05-25 00:00 |
15:21:51.41 |
-23:52:13.4 |
HIP 75329 |
26.00 |
| 2026-05-25 12:00 |
15:21:40.91 |
-23:51:51.3 |
HIP 75329 |
28.27 |
| 2026-05-26 00:00 |
15:21:30.43 |
-23:51:29.2 |
HIP 75242 |
29.92 |
| 2026-05-26 12:00 |
15:21:19.98 |
-23:51:06.9 |
HIP 75242 |
31.38 |
| 2026-05-27 00:00 |
15:21:09.54 |
-23:50:44.5 |
HIP 75012 |
32.59 |
| 2026-05-27 12:00 |
15:20:59.14 |
-23:50:22.1 |
HIP 75012 |
31.47 |
| 2026-05-28 00:00 |
15:20:48.75 |
-23:49:59.5 |
HIP 75012 |
30.50 |
| 2026-05-28 12:00 |
15:20:38.40 |
-23:49:36.9 |
HIP 75012 |
29.70 |
| 2026-05-29 00:00 |
15:20:28.07 |
-23:49:14.1 |
HIP 75012 |
29.07 |
| 2026-05-29 12:00 |
15:20:17.77 |
-23:48:51.3 |
HIP 75012 |
28.64 |
| 2026-05-30 00:00 |
15:20:07.50 |
-23:48:28.5 |
HIP 75012 |
28.40 |
| 2026-05-30 12:00 |
15:19:57.26 |
-23:48:05.5 |
HIP 75012 |
28.37 |
| 2026-05-31 00:00 |
15:19:47.06 |
-23:47:42.5 |
HIP 75012 |
28.53 |
| 2026-05-31 12:00 |
15:19:36.88 |
-23:47:19.4 |
HIP 74870 |
28.77 |
| 2026-06-01 00:00 |
15:19:26.74 |
-23:46:56.3 |
HIP 74870 |
26.80 |
| 2026-06-01 12:00 |
15:19:16.64 |
-23:46:33.1 |
HIP 74870 |
24.90 |
| 2026-06-02 00:00 |
15:19:06.57 |
-23:46:09.8 |
HIP 74870 |
23.09 |